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Cell division and migration in a 'genotype' for neural networks

Cangelosi, Angelo and Parisi, Domenico and Nolfi, Stefano (1994) Cell division and migration in a 'genotype' for neural networks. [Journal (On-line/Unpaginated)]

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Abstract

Much research has been dedicated recently to applying genetic algorithms to populations of neural networks. However, while in real organisms the inherited genotype maps in complex ways into the resulting phenotype, in most of this research the development process that creates the individual phenotype is ignored. In this paper we present a model of neural development which includes cell division and cell migration in addition to axonal growth and branching. This reflects, in a very simplified way, what happens in the ontogeny of real organisms. The development process of our artificial organisms shows successive phases of functional differentiation and specialization. In addition, we find that mutations that affect different phases of development have very different evolutionary consequences. A single change in the early stages of cell division/migration can have huge effects on the phenotype while changes in later stages have usually a less drammatic impact. Sometimes changes that affect the first developental stages may be retained producing sudden changes in evolutionary history.

Item Type:Journal (On-line/Unpaginated)
Keywords:neural networks, artificial life, genotype-phenotype mapping, modularity, neural development
Subjects:Biology > Evolution
Neuroscience > Computational Neuroscience
Computer Science > Artificial Intelligence
Computer Science > Neural Nets
Psychology > Evolutionary Psychology
ID Code:2025
Deposited By:Cangelosi, Professor Angelo
Deposited On:11 Jan 2002
Last Modified:11 Mar 2011 08:54

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